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Buyer Guide · Aug 17, 2026

1999 · Lexus300/GS 400

Asking price$0
Public guide
Asking$5,000
Mileage120,000 mi
Engine3.0L 6-Cylinder
TransmissionAutomatic 5-spd
DrivetrainRWD
BodySedan
Key takeaways

What the data shows

This 1999 Lexus GS 300 uses the long-lived 3.0-liter inline-six, but at 120,000 miles and 27 years old, timing-belt service, cooling-system plastics, suspension bushings, and electrical age faults matter more than mileage alone. Front lower ball-joint history also deserves attention on this generation.

Budget about $8,500 for deferred age and interval work, confirm the timing-belt record first, and inspect the front suspension and underside for leaks. The $5,000 asking price is slightly below the estimated private-party market midpoint.

At a Glance

What this guide surfaced
Red Flags02
01
Timing Belt Interval

the replacement interval is due by time and mileage if records cannot document recent service

02
Age-Related Rubber

a 27-year-old car is more likely to need hoses, seals, bushings, and weatherstripping

Green Flags01
01
Under Market

the $5,000 asking price is below the estimated private-party midpoint

Reliability Outlook

Modeled risk by mileage
100%
75%
50%
25%
0%
Current · 120k
39k
77k
116k
154k
193k
231k
270k
308k
LowModerateHighSevere
5.4/10
ReliabilityWeak
Deal0.0
Issues · 12 flagged12 open
Major
09
Caution
03

Next · 2 of 5

12 Findings12 items to check

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1999 Lexus GS 300/GS 400: 5.4/10 | Squeezed